Data compilation



June 16, 1964 H. SHIELDS ETAL 3,137,356

DATA COMPILATION Filed March 50, 1960 4 Sheets-Sheet 1 GRIIHN l s V 1MILLING OR PROCESSING SYSTEM I I I 2| 22 2a 24 l 25 v v v J W SCALESCALE SCALE scuz scams A B 34 I3 l5 ll l2 I4 36 RELAY RELAY RELAY UNILOGUNILOG UNILOG UNILOG /-44 A A 9 A++9+!+ 93 42 43 73 4| F(ABC+Y4Z) IINVENTORS HAROLD L- SHIELDS 8 JAMES A. GODA ATTORNEYS J1me 1964 H. L.SH|ELDS ETAL 3,137,356

DATA COMPILATION 4 Sheets-Sheet 2 Filed March 30, 1960 N OE INVENTORSHAROLD L. SHIELDS 8x ATTORNEYS June 1964 H. I SHIELDS ETAL 3, 3 56 DATACOMPILATION Filed March 50, 1960 4 Sheets-Sheet 3 UNILOGS 4| 5 4a FIG. 3

TO PIN Q) ON usA-a AMPLIFIER 7| OR 15 TO PIN (D ON USA-3 AMPLIFIER 7| on12 30 VOLTS 0.0.

T0 PIN on USA-3 AMPLIFIER 1| OR 12 J MES A. G A FIG. 4 BY f fifATTORNEYS Julie 1964 H. SHIELDS ETAL 3,

DATA COMPILATION 4 Sheets-Sheet 4 Filed March 50, 1960 AMPLIFIER R E E MF UNILOG I 30V FIG. 5

FIG. 6

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@ AMPLIFIER INVENTORS L. SHIELDS A. GO A ATTORNEYS HAROLD JAMES 22 3United States Patent 3,137,356 7 DATA COMPILATION Harold L. Shields,Cuyahoga Falls, and James A. Goda, Akron, Ohio, assignors to Rogers andAke Company, Akron, Ohio, a corporation of Ohio Filed Mar. 31), 1960,Ser. No. 18,640 11 (Ilaims. (Cl. 177-25) The present invention relatesto data compilation. More particularly, the invention relates to themeasurement, computation, indication andrecording of operationalinformation from fiow typeprocessing systems. Specifically, thepreferred form of the invention relates to a dry material process, suchas grain milling, operated continuously with measuring, computing,indicating and recording of various kinds of information to determineproduct yields.

Many dry material milling processes, or similar continuous flowprocessing systems, comprise or require performance of a series ofinterrelated and independent operations or procedures designed andintended to produce a number of products, intermediates and byproductsfrom one or more starting materials. Since the products and by-productsmay differ significantly in economic value, it is important that suchprocessing systems be operated in the most efficient manner to producethe more valuable products in the greatest amounts consistent withquality specifications.

Normally, the operator of such a processing system relies on his skilland experience to control the system in the most efiicient manner. Thestarting materials and various products may be individually weighed ormeasured andthe rates or cumulative totals recorded; At various timesthe operator may have access to this information and, by arithmeticmeans, determine any specific data for a single instance or for a givenperiod of time. As often occurs, clearical personnel will determine theprocessing efliciency for cost accounting purposes and the operator willbe informed only at a later'time when the value of such data is greatlyreduced and the opportunity for immediate control correction has passed.

Accordingly, it is the principal object of the present invention to makecontinuously available to the process superivsor or operator any and alldata pertinent to rates and ratios of the starting materials, products,by-products and losses or shrinkage.

In a flow processing system, the starting materials, products andby-products may be weighed or measured as to quantity to provideinformation for operational control; and such information shouldimmediately be transformed into analogous signals proportional to orrepresenting the several rates of flow. However, the starting materials,products and by-products may move into or out of a processing system incontinuous streams, or in batches or in lots of constant measured atrecurrent intervals of time. Many known systems employ a combination ofbatch and continuous flow techniques.

Therefore, it is another object of the invention to provide forcompilation of operational data on a continuous flow, batch flow or acombination of both techniques in a single processing system.

The starting materials, products, intermediates and byproducts movinginto and out of a processing system are measured (as to weight, volume,density, etc.) by any of several differenttypes of equipment. Suchequipment may be mechanical, electrical, pneumatic or hydraulic unitswith the desired measurement being expressed in any of several differentforms. To provide for immediate utilization of operational data, it isstill another object of the invention to provide for compilation of datafrom a variety of measurement units and in different forms.

for milling corn, when 'rneans and are combined for computation.

3,137,356 Patented June 16., 1964 These and other objects of theinvention as well as additional advantages of the invention will beapparent in View of the following description of the invention and theattached drawings depicting a preferred form of the invention.

In the drawings:

FIG. 1 is a' schematic block and flow diagram of a milling or processingsystem and the installation of components for the compilation of datatherefrom according to the invention;

FIG. 2 is a more detailed schematic showing of various components of thedata compiling installation of FIG. 1;

FIG. 3 is a schematic showing of a mechanical component of the datacompiling installation of FIG. 1;

FIG. 4 shows another form for the mechanical component of FIG. 3 (amodification within the area indicated by chain lines in FIG. 3);

FIG. 5 is a schematic showing of an electrical component of the datacompiling installation of FIG. 1; and if FIG. 6 shows a modified form ofthe electrical com ducer signals for each material are transmitted tomechanical computer units and are expressed as rates of material flow inthe form of variable or analog electrical signals from adjustablepotentiometers. The potentiometer signals are selectively directed tostabilized amplifier The signal outputs from the amplifier means areindicated by calibrated meters to give readings of the desiredoperational information.

The starting material F may be a fluent material such as a cereal grain.During milling or passage through the processing system, the material Fmay be cleaned, dehulled, flaked, ground, screened, aspirated orsubjected to other operations and procedures, to secure a desiredresult. For purposes of illustration, the processing system isconsidered as producing three products; a most to spillage, reduction inmoisturecontent, removal of dust and fines, etc.

As an example, the percent yield of a processing system operated in themost efiicient manner, should be:

Table a 1 Material symbol (F: Percent yield A 35 Pg a To effectivelycontrol the processing system, the operator should have readilyavailable the following information:

Product Yield (percent) Premium Product (Percent) X100; and

. scale switches (2ll25) are transmitted as follows: switch Process Loss(or gain) S=F (A+B+C+Y+ Z) Using the values of Table a, a good ProductYield: 72%. Assuming that the ratio of the three products is A=48.6%,B=31.6% and C=20.8%, the Premium Product=48.6%.

Referring to FIG. 1, the material F is weighed by an entry scale 10. Thescales 11, 12 and 13 are for products A, B and C, respectively. Thescales l4 and 15 are for by-products Y and Z, respectively. The scales1645, are conventional automatic dumping scales such as manufactured bythe Richardson Scale Company. Each scale is equipped with a transducermeans whereby the number of pounds of material which collect in thescale hopper and are dumped, that is, each batch or the quantity ofmaterial which passes through the scales per unit of time, is convertedto a corresponding number of electrical impulses per unit of time. Inthe exemplary data, it is assumed that scale 1d trips at 100 pounds andscales 11-15 each trip at 50 pounds.

The transducer means associated with scales 1tl-15 are conventionalelectrical momentary contact switches such as manufactured byElectro-Snap (#ES4-KM6). The scale switch, the three product switches,and the two byproduct switches are indicated at 20, 21, 22, 23, 24 and25, respectively.

In the exemplary data, if the processing system for milling corn has acapacity of 2,000 cwt. per 24 hours, the scales Ill-l5 and associatedswitches 2tl25 would dump and actuate as follows:

Table b Scale Time Pounds/ Trips] Between Symbol Minute Hour S cale II SScale Ill-Switch 20. Scale 11-Switch 21 Scale l2-Switch 22 Scaleiii-Switch 23 Digital transducer signals derived from actuation of thescale switches 21-25 are directed to a set of relays and combined in aunidirectional manner to provide analogue signals for compilation ofdata required by the operator. The preferred form of the inventionemploys three relays indicated at 3t), 31 and 32. Relays 30-32 areconventional D.C., such as manufactured by Automatic Electric(#Z-20l551) and are energized from a suitable power source (not shown).

Referring to FIG. 2, relay 30 connects to the A product scale switch 21.The direct current signal from switch 21 passes through relay 30 to theterminal block 40 of a mechanical computer unit 41. A signal from switch21 is also directed as at 33 to the input of a conventional rectifier34. Relay 31 connects directly to the B and C product scale switches 22and 23. The direct current signals from switches 22 and 23 and theoutput of rectifier 34 pass through relay 31 to a second mechanicalcomputer 42. The signals from switches 22. and 23 and rectiiier 34 arealso directed as at 35 to the input of a second rectifier 36. Relay 32connects directly to the Y and Z product scale switches, 24 and 25. Thedirect current signals from switches 24 and 25 and the output of recti-20 (F), to computer unit 44; switch 21 (A), to computer unit 41;switches 22 and 23 (B and C), to computer unit 42; switches 24 and 25 (Yand Z) to computer unit 43. Additionally, the signal from switch 21 hasalso been transmitted to units 42 and 43; and the signal from switches22 and 23 has also been transmitted to unit 43.

The mechanical computers 414-4 express the several periodicallyrecurring transducer signals from switches Zil- 25 as rates of materialhow in a form usable for electronic computation. Thus, the signal outputof unit 41 is analogous to the exit flow of A; the output of unit 42 isanalogous to the exit flow of A-l-B-i-C; the output of unit 43 isanalogous to the exit flow of A-l-B-l-C-l-Y-l-Z; and the output of unitl i is analogous to the entry flow of the starting material F.

In the preferred form of the invention, the mechanical computers 4-14 2are as disclosed and claimed in the copending application of Charles E.Rogers, Serial No. 638,399, filed February 5, 1957 now abandoned, andreplaced by continuation application Serial No. 211,945, filed July 17,1962; to which reference is made for such further details as may berequired to more fully understand the invention. Units of apparatusembodying the concepts of application Serial No. 63 8,399 aredistributed commercially under the trade name Unilog by Rogers and AkeCo., Akron, Ohio, who are also assignees of the present invention.

Referring to FIG. 3, each unit 41-44 has an axially mounted relativelylarge diameter disc 46, a threaded shaft 48 mounted radially of therotational axis of the disc 45, and, a smaller diameter disc 50 providedwith an axial hub 51 having internal threads continuously engaging thethreads of shaft 48 and an outer surface 52 in continuous frictionalcontact with the surface of disc 46.

The disc 46 is driven by a suitable means such as a synchronous motor 53to provide a mechanical force on the outer surface 52 of disc 50. Bothends of shaft 43 are journaled as in stanchions 54 set 180 apart onopposite sides of the disc .6 so that the longitudinal axis of the shaftintersects the rotational axis of the disc at substantially rightangles. The shaft 455 is driven by a suitable intermittently actuatedmeans such as a rotary solenoid 55 so that the angularly displaced shaftthreads provide a mechanical force against the hub 51 of the small disc50. The hub 51 is provided with a bracket 56 having clevis-like lowerends. The upper portion of bracket 56 carries a horizontal rack segment57 or" any desired length.

The synchronous motors 53 of each unit ll-d4 are rotated at a constantspeed to provide the denominator (y) of a rate calculation. Thesolenoids 55 of each unit 4144 are rotated a preselected number ofdegrees per each transducer signal received through terminal block illto provide the numerator (x) of a rate calculation. Rate (x/y) isdetermined by a force equivalent to x which is applied as power to shaft48 and tends to move the small disc laterally. This motion ismechanically opposed by a constant force equivalent to y. When theseforces are in balance, a rate, that is, the ratio of x to y or x/y hasbeen established.

The rate of product flow as established by the position of the smalldisc Sill in each unit 41-44 is indicated and expressed as an electricalsignal by adjustable potentiometers having a variable output voltage.FIG. 3 depicts the computer units designated as 41 and 43 in FIG. 2.

These units establish the rate of A/ y and -lid- -l- WY respectively. Inthis form, the teeth of each rack segment 57 mesh with a pinion 58 onthe adjusting shaft of a single potentiometer 60.

Referring to FIG.4, the computer units 42 and 44 establish the rate of(A +B+C y and F respectively. Additionally, unit 42 supplies a ratesignal for the computation A/ (A-i-B-i-C) and unit 44 supplies a signalfor the computation (A+B+C)/F. Accordingly, in units 42 and 44, theteethof a lengthened gear segment 57 mesh with pinions 59 on the adjustingshafts of two variable output voltage otentiometers 61 and 62.

In the preferred form of the invention, the variable electrical signalsfrom the potentiometers 60-62 are selectively combined in threeamplifiers 71, 72 and 73 to perform the desired computations. Theamplifiers 71-73 are conventional stabilized amplifiers such asmanufactured by Philbrick (#USA3M3) or equivalent. The amplifier 71performs the computation A/(A-|B+C). The rate of product A exit flowtransmitted from potentiometer 60 in unit 41 is multiplied by thereciprocal of a 6 through a resistor 77 i to the input terminal 78 ofthe amplifier 73. The negative voltage signal from potentiometer 60 inunit 43 is also transmitted through resistor 79 to the input terminal78. The opposite polarity signals are combined and the output potentialfrom terminal 89 is F(A+BIC+Y+Z) and when indicated at a suitablycalibrated meter 93 will give a reading of unit loss, or S. Astabilizing resistor 81 is inserted between output terminal 80 and theinput terminal 78.

By way of example, the components of apparatus described above may beoperated as follows Each motor 53 may be adjusted to rotate each largedisc 46 at 15 revolutions per hour. the mechanical unit 4143 may beadjusted to rotate each threaded shaft 45 for each transducer signalreceived through a terminal block 40. The solenoid of unit 44 would thenrotate its threaded shaft 58, 90 for each transducer signal. may have asignal output in the range zero to 30 volts. Assuming that one (1) voltsignal output from the potentiometers 60 and 61 is equal to 8 lbs. ofmaterial per minute, the data of Table b would be expressed as followsat the appropriate meter 91-93.

Table C Output Signal Applied Voltage Signal Meter and Voltage ReadingUnit 41-(s0alc ll, switch 21) Pot. 60.-. A +30 8. 75 [A/A+B+G) Unit42-(scale 11, switch 21) Pot. 62.--" 1/(A+B+C) Output, Am- Meter 91,48.6%.

I plifier 71.

Unit 42-(scales 11,12 and 13, switches A+B+O +30 18 [A+B+O/F] 21, 22 and23) Pot. 61.

Unit 44-(sea1e 10, switch 10) Pot. 62... l/F Output Am- Meter 92, 72%.

- plifier 72. 1

Unit 44-(scale10, switch 10) Pot. 61 F +30 [F-A-l-B-t-O +Y+Z1=S Unit43-(scales 11, 12, 13, 14 and 15, A+B+C+Y+Z 24. 51 Meter 93, 2%.

switches 21, 22, 23, 24 and 25) Pot. 60.

of the starting material F transmitted from potentiometer 62 in unit 44.The amplifier 2 performs the computa tion F(A +B-I-C-I-Y-l-Z). The entryflow of the starting material F from potentiometer 61 in unit 44,expressed as a positive potential, is opposed by the rate of productsA+B+C+Y+Z exit flow transmitted from potentiometer 60 in unit 43,expressed as a negative potential.

, Referring to FIG. 5, the output from potentiometer 60 in unit 41 istransmitted through a resistor 74 to; the input terminal 75 of theamplifier 71. The output potential of the amplifier is applied fromterminal 76 to an indicating meter 91. The output potential fromterminal 76 is also applied to the potentiometer 62 in unit 42 and theoutput therefrom is fed back as l/ (A +B+C) through a resistor 77,matching resistor 74, to the input terminal 75. Thus, the outputindicated at meter 91 when suitably calibrated will indicate or expressto give a reading 'of premium product percent.

Referring still to FIG. 5, the second amplifier 72 is similar toamplifier 71. The output from potentiometer 61 in unit 42 is multipliedby the output from potentiometer 62 in unit 44. Thus, the output ofamplifier 72 is (A +B+C F and when transmitted to a suitably calibratedmeter 92 will indicate product yield.

Referring to FIG. 6, the output from potentiometer 61 in unit 44(expressed as a positive voltage) is transmitted Although the conceptsof the invention have been described and illustrated in conjunction witha grain milling process, it will be apparent that the invention hasother applications. Accordingly, the scope of the invention should belimited only by the claims which are intended to include use of theconcepts thereof for data compilation from any flow type processingsystem in which the amounts of starting materials, products,intermediates or by-products may be determined and converted to adigital transducer signal.

What is claimed is:

1. Apparatus for compilation of operational information from a flow typeprocessing system, comprising, means for measuring unit quantities ofstarting and product materials entering and leaving said system,transducer means with each of said measuring means for converting saidunit quantities of materials to a correspond-' with each of saidweighing means for converting unit weights of material to acorresponding number of digital impulses, mechanical means forconverting said digital transducer impulses to rates of material flow,potentiometer means with said mechanical means for expressing said ratesof flow as variable analog signals, stabilized am- Each solenoid 55 ofEach of the potentiometers 60 and 61 7 plifier means for selectivelycombining said analog signals, and calibrated means for indicating theoutput of said amplifier means.

' 3. Apparatus for compilation of operational information from a flowtype processing system, comprising, dump scales to determine the weightof starting and product materials entering and leaving said system,electrical switch means associated with each said scale providing adigital impulse corresponding to the quantity of material passingthrough each scale per unit of time, mechanical means actuated by saiddigital switch impulses to express rates of material flow, variableoutput potentiometer means adjusted by said mechanical means to transmitan electrical signal analogous to a rate of flow, stabilized amplifiermeans for selectively combining said analogous electrical signals toperform mathematical computations, and calibrated means for indicatingthe results of said mathematical computations as operationalinformation.

4. Apparatus for compilation of desired information from a flow typeprocessing system, said desired information including the ratio ofproduct material exit flow to startingmaterial entry flow, comprising,batch means for weighing the quantity of starting material entering thesystem, batch means for weighing the quantity of product materialleaving the system, transducer means with each said measuring meanstransmitting digital impulses corresponding to unit quantities of saidmaterials, a first mechanical means for converting a digital transducerimpulse to rate of product material exit flow, a first potentiometermeans with said first mechanical means for expressing the rate ofproduct material exit flow as an analog signal, a second mechanicalmeans for converting a digital transducer impulse to rate of startingmaterial entry flow, a second potentiometer means with said secondmechanical means for expressing the reciprocal of the rate of startingmaterial entry flow as an analog signal, and, amplifier means forcombining the signals from said first and second potentiometer means tocompute said desired information ratio.

5. Apparatus for compilation of desired information from a flow typeprocessing system, said desired information including the ratio ofproduct material exit flow to starting material entry flow, comprising,batch means for weighing the starting material entering the system,batch means for weighing the product material leaving the system, anelectrical switch means associated with each said weighing meanstransmitting digital impulses corresponding to unit weights of saidmaterials, a first mechanical means actuated by the digital impulsesfrom one of said switch means to express the rate of product materialexit flow, a first potentiometer means with said first mechanical meansfor expressing the rate of product material exit flow as an analogsignal, a second mechanical means actuated by the digital impulses fromthe other of said switch means to express the rate of starting materialentry flow, a second potentiometer means with said second mechanicalmeans for expressing the reciprocal of the rate of starting materialentry flow as an analog signal, and, amplifier means for combining theanalog signals from said first and second potentiometer means to computesaid desired information ratio.

6. Apparatus for compilation of desired information from a flow typeprocessing system, said desired information including the ratio ofproduct material exit fiow to starting material entry flow, comprising,batch means for Weighing the starting material entering the system,batch means for weighing the product material leaving the system, anelectrical switch means associated with each said weighing meanstransmitting digital impulses corresponting to unit weights of saidmaterials, a first mechanical means actuated by the digital impulsesfrom one of said switch means to express the rate of product materialexit flow, a first potentiometer means with said first mechanical meansfor expressing the rate of product material exit flow as an analogsignal, a second mechanical means actuted by the digital impulses fromthe other of said switch means to express the rate of starting materialentry flow, a second potentiometer means with said second mechanicalmeans for expressing the reciprocal of the rate of starting materialentry flow as an analog signal, amplifier means for combining said firstand second potentiometer means analog signals to compute said desiredinformation'ratio, and, calibrated means for indicating the result ofsaid computation.

7. Apparatus for compilation of desired information from flow typeprocessing systems producing at least two products, A and B, saiddesired information including the ratio of the quantity of A to thequantity of A plus B, comprising, batch means for weighing the quantityof A leaving the system, batch means for weighing the quantity of Bleaving the system, transducer means with each said measuring meanstransmitting digital impulses corre sponding to said unit quantities ofA and B, a first meohanical means for converting a digital transducerimpulse to rate of material A flow, relay means for unidirectionallycombining the digital transducer impulses, a second mechanical mean-sfor converting the combined impulses from said relay means to rate ofmaterial A and material B flow, a first potentiometer means with saidfirst mechanical means for expressing the rate of material A flow as ananalog signal, a second potentiometer means with said second mechanicalmeans for expressing the reciprocal of the rate of material A andmaterial B flow as an analog signal, and, amplifier means for combiningthe analog signals from said first and second potentiometer means tocompute said desired information ratio.

8. Apparatus for compilation of desired information from flow typeprocessing systems producing at least two products, A and B, saiddesired information including the ratio of the quantity of A to thequantity of A plus B, comprising, batch means for weighing the materialA leaving the system, bate-h means for weighing the material B leavingthe system, an electrical switch means associated with each saidweighing means transmitting a digital impulse corresponding to saidweights of A and B, a first mechanical means for converting a digitalswitch impulse to rate of material A flow, relay means forunidirectionally combinin the di ital impulses, a second mechanicalmeans for converting the combined impulses from said relay means to rateof material A and material B flow, a first potentiometer means with saidfirst mechanical means for expressing the rate of material A flow as ananalog signal, a second potentiometer means with said second mechanicalmeans for expressing the reciprocal of the rate of material A andmaterial B flow as an analog signal, amplifier means for combining saidfirst and second potentiometer means analog signals to compute saiddesired information ratio, and, calibrated means for indicating theesult of said computation.

9. Apparatus for compilation of desired information from flow typeprocessing systems, said desired information including the quantity ofstarting material minus the quantity of product material to determineloss of material during processing, comprising, means for measuring theunit quantity of starting material entering the system, means formeasuring the unit quantity of product material leaving the system,transducer means with each measuring means transmitting digital impulsescorresponding to the unit quantities of said material, a firstiechanical means for converting a digital impulse to rate of startingmaterial entry flow, a first potentiometer means with said firstmechanical means for expressing the rate of starting material entry flowas an analog signal of one polarity, a second mechanical means forconverting a digital impulse to rate of product material exit flow, asecond potentiometer means with said second mechanical means forexpressing the rate of product material exit flow as an analog signal ofopposite polarity, and a means for combining said first and secondpotentiometer signals to compute said loss of material.

10. Apparatus for compilation of desired information from flow typeprocessing systems, said desired information including the quantity ofstarting material minus the quantity of product material to determineloss of material during processing, comprising, batch means for weighingthe starting material entering the system, batch means for weighing theproduct material leaving the system, an elec trical switch meansassociated with each said weighing means transmitting digital impulsescorresponding to unit Weights of said materials, a first mechanicalmeans for converting a digital switch impulse to rate of startingmaterial entry flow, a first potentiometer means with said 1 firstmechanical means forexpressingthe rate of starting materialentry flow asan analog signal of one polarity, a second mechanical means forconverting a digital switch impulse to rate of product material exitflow, a second potentiometer means with said second mechanical means forexpressing the rate of product material exit flow as an analog signal ofopposite polarity, and, means for combining said first and second analogsignals to compute said loss of material.

11. Apparatus for compilation of desired information from fiowatypeprocessing systems, said desired information including the quantity ofstarting material minus the quantity of product material to determineloss of material during'processing, comprising, batch means for Weighingthe starting material entering the system, batch means lit for weighingthe product material leaving the system, an electrical switch meansassociated with each said Weighing means transmitting digital impulsescorresponding to unit weights of said materials, a first mechanicalmeans for converting a digital switch impulse to rate of startingmaterial entry flow, a first potentiometer means with said ReferencesCited in the file of this patent UNITED STATES PATENTS 2,371,040 FisherMar. 6, 1945 2,857,151 Brabender Oct. 21, 1958 2,901,171 Kolisch Aug.25, 1959 OTHER REFERENCES Proceedings of the Eastern ComputorConference, pgs. 34-39, December 1957, article by C. H. Taylor, Jr.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,137,356 June 16, 1964 Harold L. Shields et a1 It is hereby certifiedthat and? appears in the above numbered patent requiring correction andthat the said Letters Patent should read as corrected below.

Column 1, line 20 for "independent" read interdepend ent line 37 forClear'ical read clerica1--; columns 5 and 6, Table C under the heading"Applied Voltage", item 4 after "Output" insert a comma; column 6, line6& for "calibrating" read calibrated Signed and sealed this 3rd day ofNovember 1964.,

(SEAL) Attest:

ERNEST W. SWIDER EDWARD J. BRENNER Anesting Officer Commissioner ofPatents UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No.3,137,356 June 16, 1964 Harold L. Shields et 31 It is hereby certifiedthat erroi fippar's in the abovenumbered patent requiring correction andthat the said Letters Patent should read as corrected below Column 1,line 2O for "independent" read interdependent line 37 for clearical"read clerical-; columns 5 and 6, Table C under the heading "AppliedVoltage", item 4, after "Output" insert a comma; column 6, line 64, for"calibrating" read calibrated Signed and sealed this 3rd day of November1964a SEAL) Attest:

ERNEST W. SWIDER Y EDWARD J. BRENNER Attesting Officer Commissioner ofPatents

1. APPARATUS FOR COMPILATION OF OPERATIONAL INFORMATION FROM A FLOW TYPEPROCESSING SYSTEM, COMPRISING, MEANS FOR MEASURING UNIT QUANTITIES OFSTARTING AND PRODUCT MATERIALS ENTERING AND LEAVING SAID SYSTEM,TRANSDUCER MEANS WITH EACH OF SAID MEASURING MEANS FOR CONVERTING SAIDUNIT QUANTITIES OF MATERIALS TO A CORRESPONDING NUMBER OF DIGITALIMPULSES, MECHANICAL MEANS FOR CONVERTING SAID DIGITAL TRANSDUCERIMPULSES TO RATES OF MATERIAL FLOW, POTENTIOMETER MEANS WITH SAIDMECHANICAL MEANS FOR EXPRESSING SAID RATES OF FLOW AS VARIABLE ANALOGSIGNALS, STABILIZED AMPLIFIER MEANS FOR SELECTIVELY COMBINING SAIDANALOG SIGNALS, AND CALIBRATING MEANS FOR INDICATING THE OUTPUT OF SAIDAMPLIFIER MEANS.